Resource recovery auxiliary equipment and method for underground mine room-and-pillar mining process

Abstract

The invention relates to the technical field of auxiliary equipment, in particular to resource recovery auxiliary equipment and method for an underground mine room and pillar mining process. In order to solve the problems that the reinforcing effect and the operation safety are affected due to the fact that the surfaces of jambs which are different in size and are left by an underground mine shallow mining room-pillar method are irregular and the insertion positions of anchor rods are difficult to determine accurately, the following technical scheme is provided: the method comprises a moving trolley which moves around the jambs; the lifting plate is arranged above the moving trolley and can move up and down; the distance sensing mechanisms are installed at the two ends of the lifting plate and used for monitoring the changing curve of the surface of the ore pillar; and the positioning hole forming assembly is arranged between the two groups of distance sensing mechanisms. The surface of the ore pillar is monitored, the moving track is calibrated, the anchor rod positioning accuracy and the concrete reinforcing effect are improved, the manual operation risk is reduced, and the safety and efficiency of mine resource recycling operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of auxiliary equipment, and particularly relates to resource recovery auxiliary equipment and method for room-and-pillar mining process of underground mine. BACKGROUND

[0002] In the field of underground mining, as a commonly used mining process, the shallow mining room-and-pillar method will leave a large number of pillars with different shapes and uneven cross-sectional sizes in the goaf during long-term application. On the one hand, these left-over pillars occupy valuable mineral resources, and on the other hand, with the continuous advancement of mining operations, the structural stability of some small cross-section pillars gradually decreases, which is difficult to meet the safety requirements of subsequent support in the goaf, while large cross-section pillars have certain support capacity, but due to their considerable resource reserves, they have high recycling value. How to realize the efficient recovery of large cross-section pillars under the premise of ensuring the safety of the goaf has become a key problem to be solved in the industry.

[0003] In order to balance the support function of small cross-section pillars and the resource recovery demand of large cross-section pillars, the prior art proposes a scheme of reinforcing the small cross-section pillars, specifically by pouring a concrete layer outside the small cross-section pillars to enhance the overall bearing capacity of the pillars and improve their support effect on the goaf, thereby creating a safe and stable environment for the subsequent recovery of large cross-section pillars. However, in the process of concrete pouring and reinforcement, in order to ensure that the concrete layer and the original pillar can be tightly combined and avoid peeling, a plurality of anchor rods are usually inserted outside the pillar in advance to strengthen the connection firmness of the two by the anchoring effect of the anchor rods, thereby further ensuring the stability of the reinforced structure.

[0004] However, due to the complex formation process of the left-over pillars in the underground mine, which is affected by various factors such as geological conditions and mining process, irregular concave-convex undulations and various defects are generally present on the surface of the pillars, which makes it difficult to achieve uniform distribution according to the design requirements when determining the installation position of the anchor rods. The uneven distribution of anchor rods not only affects the connection and reinforcement effect between the concrete and the pillar, reduces the stability of the overall structure, but also may cause safety hazards in subsequent mining operations, which is not conducive to the efficient and safe development of mining operations. In view of this, the present application proposes resource recovery auxiliary equipment and method for room-and-pillar mining process of underground mine. SUMMARY

[0005] The purpose of the present application is to solve the problem of irregular surface of the pillars left by the room-and-pillar method of the underground mine, which makes it difficult to accurately determine the insertion position of the anchor rods, affecting the reinforcement effect and operation safety, and proposes resource recovery auxiliary equipment and method for room-and-pillar mining process of underground mine.

[0006] In a first aspect, the present invention provides an auxiliary device for resource recovery in the room-and-pillar mining process of an underground mine, including a mobile trolley that moves around a pillar; a lifting plate arranged above the mobile trolley, which can move up and down; a distance sensing mechanism installed at both ends of the lifting plate, which is used to monitor the change curve of the pillar surface; a positioning hole opening component arranged between two groups of the distance sensing mechanisms, which is used to drill anchor bolt positioning holes on the pillar surface; a lifting adjustment mechanism installed between the mobile trolley and the lifting plate, which is used to drive the lifting plate to rise and fall and adjust the heights of the distance sensing mechanism and the positioning hole opening component.

[0007] Optionally, the mobile trolley includes a bottom plate, a set of front wheels and a set of rear wheels are arranged below the bottom plate, a steering module for driving the front wheels to turn is installed at the bottom of the bottom plate, and a power driving module for driving the rear wheels to rotate is also installed on the bottom plate.

[0008] Optionally, multiple groups of fixed frames are arranged on the outer side of the lifting plate. The fixed frames are arranged in a "冂" shape and are fixedly connected to the bottom plate. Two groups of first slide rails are fixedly connected to the inner side of the fixed frames. The two groups of first slide rails are symmetrically arranged on both sides of the lifting plate. A first slider is slidably connected to the first slide rail, and the first slider is fixedly connected to the lifting plate.

[0009] Optionally, the distance sensing mechanism includes a mounting plate fixedly connected to the top of the lifting plate. The mounting plate is arranged in an L shape. Multiple groups of first limiting rods are slidably connected to the mounting plate. One ends of the multiple groups of first limiting rods are fixedly connected together to form a mounting frame. The mounting frame is arranged in a "凵" shape. A roller is rotatably connected in the mounting frame. A fixing plate is slidably connected to the two groups of first limiting rods together. The fixing plate is fixedly connected to the mounting plate. A fixing ring is fixedly sleeved on the outer circle of the first limiting rod. The fixing ring is located on the side of the mounting plate away from the mounting frame. A spring is sleeved on the outer circle of the first limiting rod. The spring is arranged between the fixing plate and the fixing ring. One ends of the first limiting rods away from the mounting frame are fixedly connected together to form a limiting plate. A first limiting cylinder is slidably sleeved on the outer circle of the first limiting rod. The first limiting cylinder is fixedly connected to the side of the mounting plate close to the mounting frame.

[0010] Optionally, a magnetic grating is installed on the mounting plate, and a magnetic head cooperating with the magnetic grating is installed at the bottom of the limiting plate.

[0011] Optionally, the positioning hole opening assembly comprises a first push rod motor mounted on the top of the lifting plate, a connecting plate is fixedly connected to the output end of the first push rod motor, the connecting plate is arranged in an L shape, a motor plate is fixedly connected to one end of the connecting plate, a servo motor is mounted on the side of the motor plate close to the lifting plate, the output end of the servo motor penetrates through the motor plate and is fixedly connected with a drill rod, two groups of second limiting rods are fixedly connected to the side of the motor plate close to the lifting plate, the two groups of second limiting rods are symmetrically arranged on the two sides of the servo motor, and a second limiting cylinder is slidably connected to the second limiting rod.

[0012] Optionally, the lifting adjusting mechanism comprises two groups of second sliding rails fixedly connected to the opposite sides of the bottom plate and the lifting plate, a second sliding block is slidably connected to the second sliding rail, mounting seats are fixedly connected to the opposite sides of the two groups of second sliding blocks corresponding in position, a support rod is rotatably connected in the mounting seat, the two groups of support rods are cross arranged, two groups of fixing blocks are fixedly connected to the opposite sides of the bottom plate and the lifting plate, a connecting groove is formed in the fixing block, a positioning rod is fixedly connected in the connecting groove, one end of the support rod away from the mounting seat is rotatably connected to the positioning rod, and a plurality of groups of support rods are rotatably connected with a synchronous rod at the cross positions.

[0013] Optionally, the lifting adjusting mechanism further comprises a second push rod motor mounted on the top of the bottom plate, a connecting block is fixedly connected to the output end of the second push rod motor, a moving rod is fixedly connected in the connecting block, the moving rod penetrates through the two groups of mounting seats below and the support rods therein, and the support rods are rotatably connected with the moving rod.

[0014] Optionally, the control box is electrically connected with the steering module, the power driving module, the magnetic grid, the magnetic head, the first push rod motor, the servo motor, the second push rod motor and (6).

[0015] In a second aspect, the present application provides an auxiliary method for a resource recovery auxiliary device for a room and pillar mining process of an underground mine, comprising the following steps:

[0016] Step one, divide and set a safety isolation channel in a preset mining area, use a concrete mixed slurry to build a retaining wall to connect existing pillars in the mining area, and leave more than two safety channels in each mining area;

[0017] Step two, support the roof of the ore layer with anchor nets, and the net degree of the anchor net is less than or equal to 100 mm, after the anchor net is fixed by anchor rods, the anchor cable is reinforced, and the tension of the anchor cable is greater than or equal to 60 KN;

[0018] Step three, the control box sends instructions to the power drive module, the power drive module drives the rear wheels to rotate, and then drives the mobile trolley to move as a whole, the control box adjusts the steering of the front wheels through the steering module, so that the mobile trolley preliminarily approaches the pillar to be reinforced;

[0019] Step four, the rollers in the installation frame are attached to the surface of the pillar, the rollers are always closely attached to the surface of the pillar, as the mobile trolley moves, the magnetic head slides along the magnetic grid on the installation plate, the magnetic head transmits displacement data to the control box in real time, the control box judges the concave-convex condition of the surface of the pillar according to the data, and sends instructions to the steering module to adjust the steering angle of the front wheels, so as to ensure that the mobile trolley always moves stably along the outer circle of the pillar;

[0020] Step five, after the control box receives the concave-convex data of the surface of the pillar transmitted by the distance sensing mechanism, it sends the elongation or shortening instructions to the first push rod motor, and synchronously controls the power drive module to make the mobile trolley stop after moving a fixed distance each time, and repeats the above drilling steps to realize the equidistant distribution of the anchor rod positioning holes at the same height of the pillar;

[0021] Step six, when the positioning holes at the same height of the pillar are drilled, the control box sends instructions to the second push rod motor, the output end of the second push rod motor drives the connecting block to move, and the lifting plate is lifted to the preset height, then the control box controls the mobile trolley to move around the pillar again, and repeats the above process to complete the drilling of the anchor rod positioning holes at this height. The height of the lifting plate is adjusted multiple times by the lifting adjustment mechanism to form multiple rows of equidistantly distributed anchor rod positioning holes on the surface of the pillar;

[0022] Step seven, workers insert anchor rods into the pillar according to the position of the positioning hole, use C25 concrete to reinforce or connect the small pillars planned to form a standard support capacity, the anchor rods inserted around the small pillars are connected with the reinforced concrete, and the support force of the pillars can also be connected and reinforced by concrete. The concrete is poured in layers from bottom to top, and after pouring the bottom layer, the drilling of the next layer and the insertion of the anchor rod are carried out;

[0023] Step eight, according to the first number of the reinforced pillars, the mine house is divided, and the small and dense pillars in the mine house are prepared for recovery;

[0024] Step nine, after the concrete of the reinforced pillars is cured to the standard, the excessive pillars in the mine house are recovered, and the roof corresponding to the position of the pillars is supported after recovery;

[0025] Step ten, lifting bottom recovery operation, normal lifting bottom recovery operation from top to bottom, which does not damage and reduce the size of the set reinforced pillars;

[0026] Step eleven, backfill the mine house in different areas, according to the recovery sequence, backfill the mine house in different areas, according to the recovery sequence, and use the idea of fast mining and fast filling to backfill the mine house. The backfill height is reserved for 3m, and the sand mortar dense filling is carried out after the whole panel is recovered.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] The present application monitors the surface of the pillar and calibrates the moving track, which not only improves the positioning accuracy of the anchor rod and the reinforcement effect of the concrete, but also reduces the risk of manual operation, improves the safety and efficiency of the mining resource recovery operation.

[0029] Further, the lifting adjusting mechanism adjusts the height of the lifting plate through the second push rod motor and the supporting rod, which can form multiple rows of equidistant positioning holes on the surface of the pillar, ensure the accurate installation position of the subsequent anchor rod, greatly improve the connection firmness of the concrete and the pillar, and enhance the support capacity of the small cross-section pillar after reinforcement, providing a safe and stable environment for large cross-section pillar recovery.

[0030] In summary, the present application monitors the surface of the pillar and calibrates the moving track, which not only improves the positioning accuracy of the anchor rod and the reinforcement effect of the concrete, but also reduces the risk of manual operation, improves the safety and efficiency of the mining resource recovery operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of a resource recovery auxiliary equipment and method for underground mine room and pillar mining process;

[0032] Figure 2 is a cross-sectional structural schematic diagram of the distance sensing mechanism;

[0033] Figure 3 is a cross-sectional structural schematic diagram of the positioning hole opening assembly;

[0034] Figure 4 is a cross-sectional schematic diagram of the moving trolley;

[0035] Figure 5 is Figure 1 is an enlarged schematic diagram of position A in FIG.

[0036] Figure 6 is Figure 4 is an enlarged schematic diagram of position B in FIG.

[0037] Figure 7 is Figure 4 is an enlarged schematic diagram of position C in FIG.

[0038] Figure 8 is Figure 4 is an enlarged schematic diagram of position D in FIG.

[0039] LIST OF REFERENCE NUMBERS:

[0040] 1, mobile trolley; 11, bottom plate; 12, front wheel; 13, rear wheel; 14, steering module; 15, power drive module;

[0041] 2, lifting plate; 21, first sliding block; 22, first sliding rail; 23, fixed frame;

[0042] 3, distance sensing mechanism; 31, mounting plate; 32, first limiting rod; 33, mounting frame; 34, roller; 35, fixed plate; 36, fixed ring; 37, spring; 38, limiting plate; 39, magnetic grid; 310, magnetic head; 311, first limiting cylinder;

[0043] 4, positioning hole opening assembly; 41, first push rod motor; 42, connecting plate; 43, motor plate; 44, servo motor; 45, drill rod; 46, second limiting rod; 47, second limiting cylinder;

[0044] 5, lifting adjustment mechanism; 51, second sliding rail; 52, second sliding block; 53, mounting seat; 54, support rod; 55, fixed block; 56, connecting groove; 57, positioning rod; 58, synchronous rod; 59, moving rod; 510, connecting block; 511, second push rod motor;

[0045] 6, battery box; 7, control box. DETAILED DESCRIPTION

[0046] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments.

[0047] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0048] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0049] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] Embodiment

[0052] As Figure 1 shown, the resource recovery auxiliary equipment for the room-and-pillar mining process in an underground mine proposed by the present invention includes a moving trolley 1 that moves around a pillar. The moving trolley 1 includes a bottom plate 11. A set of front wheels 12 and a set of rear wheels 13 are provided below the bottom plate 11. A steering module 14 for driving the front wheels 12 to turn is installed at the bottom of the bottom plate 11. A power driving module 15 for driving the rear wheels 13 to rotate is also installed on the bottom plate 11. The moving trolley 1 is a prior art and will not be elaborated here.

[0053] Furthermore, please refer to Figure 1 and Figure 5 , the above-mentioned auxiliary equipment includes a lifting plate 2 arranged above the moving trolley 1. The lifting plate 2 can move up and down. Two groups of fixed frames 23 are arranged outside the lifting plate 2. The fixed frames 23 are arranged in a "冂" shape and are fixedly connected to the bottom plate 11, and the positions of the fixed frames 23 are fixed. Two groups of first sliding rails 22 are fixedly connected to the inside of the fixed frames 23. The two groups of first sliding rails 22 are symmetrically arranged on both sides of the lifting plate 2. A first slider 21 is slidably connected to the first sliding rail 22. The first slider 21 is fixedly connected to the lifting plate 2. Through the limiting effect of the first slider 21 and the first sliding rail 22, the lifting process of the lifting plate 2 moves smoothly.

[0054] Specifically, as Figure 1 、 Figure 2 and Figure 5As shown, the auxiliary device includes distance sensing mechanism 3 installed at both ends of lifting plate 2, which is used to monitor the change curve of the pillar surface, so as to facilitate the steering of front wheels 12 by steering module 14, and ensure that mobile trolley 1 always moves around the outer position of the pillar. Distance sensing mechanism 3 includes mounting plate 31 fixedly connected to the top of lifting plate 2, which moves synchronously with lifting plate 2. Mounting plate 31 is L-shaped, and a plurality of first limiting rods 32 are slidably connected to mounting plate 31, one end of first limiting rods 32 is fixedly connected to mounting frame 33, and first limiting rods 32 are slidably sleeved with first limiting cylinder 311, first limiting cylinder 311 is fixedly connected to one side of mounting plate 31 close to mounting frame 33, and the movement of mounting frame 33 is stable through the limiting action of first limiting rods 32 and first limiting cylinder 311. Mounting frame 33 is in the shape of a "n" and is rotatably connected with roller 34, which keeps its position in mounting frame 33 and rolls on the surface of the pillar as mobile trolley 1 moves. Two groups of first limiting rods 32 are slidably connected with fixed plate 35, which is fixedly connected with mounting plate 31 and has a fixed position. First limiting rods 32 are fixedly sleeved with fixed ring 36 on the outer circle, which is located on the side of mounting plate 31 away from mounting frame 33, and springs 37 are fixedly sleeved on the outer circle of first limiting rods 32, which are arranged between fixed plate 35 and fixed ring 36. When roller 34 passes through the protruding position of the pillar surface, mounting frame 33 moves and drives fixed ring 36 to move through first limiting rods 32, and fixed ring 36 is pressed when it moves, and the spring force of springs 37 makes roller 34 always adhere to the surface of the pillar. The end of first limiting rods 32 away from mounting frame 33 is fixedly connected with limiting plate 38, which moves synchronously with roller 34. Magnetic grid 39 is installed on mounting plate 31, and magnetic head 310 cooperating with magnetic grid 39 is installed on the bottom of limiting plate 38. Through the arrangement of limiting plate 38 and magnetic grid 39, combined with the characteristics that roller 34 always adheres to the surface of the pillar, the distance between lifting plate 2 and the pillar can be monitored in real time, so as to facilitate the control of when and how much steering module 14 steers, so that mobile trolley 1 can move around the pillar.

[0055] Further, please refer to Figure 1 and Figure 3The auxiliary device further comprises a positioning hole opening assembly 4 arranged between the two groups of distance sensing mechanisms 3, which is used for drilling anchor rod positioning holes on the surface of the pillar. The positioning hole opening assembly 4 comprises a first push rod motor 41 mounted on the top of the lifting plate 2, and the output end of the first push rod motor 41 is fixedly connected with a connecting plate 42, which is arranged in an L shape. One end of the connecting plate 42 is fixedly connected with a motor plate 43, and the motor plate 43 is moved by the connecting plate 42 after the first push rod motor 41 is started. A servo motor 44 is mounted on the side of the motor plate 43 close to the lifting plate 2, and the L-shaped arrangement of the connecting plate 42 facilitates the installation of the servo motor 44. The output end of the servo motor 44 penetrates through the motor plate 43 and is fixedly connected with a drill rod 45. After the servo motor 44 is started, the drill rod 45 is rotated, which facilitates the opening of the anchor rod positioning hole on the pillar after the drill rod 45 contacts the pillar. The motor plate 43 is fixedly connected with two groups of second limiting rods 46 on the side close to the lifting plate 2, and the two groups of second limiting rods 46 are symmetrically arranged on the two sides of the servo motor 44. A second limiting cylinder 47 is slidably connected to the second limiting rod 46, and the second limiting cylinder 47 is fixedly connected with the lifting plate 2. The movement of the motor plate 43 is stable through the limiting action of the second limiting rod 46 and the second limiting cylinder 47. The extension length of the first push rod motor 41 is determined according to the surface concave-convex condition of the pillar monitored by the magnetic grid 39 and the magnetic head 310 in the front group of distance sensing mechanisms 3 in the moving direction of the moving trolley 1, so that after the first push rod motor 41 is extended, the drill rod 45 is drilled into the surface of the pillar by half its own length, which prevents the drill rod 45 from not contacting the pillar due to the too short extension length of the first push rod motor 41, and avoids the motor plate 43 contacting the surface of the pillar due to the too long extension length of the first push rod motor 41, thereby ensuring the stable opening of the anchor rod positioning hole. At the same time, the moving distance of the rear wheel 13 is controlled by the power driving module 15, and after moving a fixed distance each time, the first push rod motor 41 is controlled to extend to drive the drill rod 45 to contact the pillar to open the anchor rod positioning hole, thereby ensuring the equidistant distribution of the anchor rod positioning hole and improving the connection and reinforcement effect between the subsequent concrete pouring and the pillar, ensuring the stability of the overall structure, avoiding safety hazards in subsequent mining operations, and facilitating the efficient and safe development of the mining operation.

[0056] Further, as Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the auxiliary device further comprises a lifting adjusting mechanism 5 installed between the mobile trolley 1 and the lifting plate 2, which is used to drive the lifting plate 2 to lift and adjust the height of the distance sensing mechanism 3 and the positioning hole opening assembly 4, so as to open the anchor rod positioning holes at different heights. The lifting adjusting mechanism 5 comprises two groups of second sliding rails 51 fixedly connected to the opposite sides of the bottom plate 11 and the lifting plate 2, respectively, and a second sliding block 52 slidably connected to the second sliding rail 51, which moves stably. The opposite sides of the two groups of second sliding blocks 52 corresponding in position are fixedly connected with mounting seats 53, the mounting seats 53 are rotatably connected with support rods 54, and the two groups of support rods 54 are crossly arranged. The opposite sides of the bottom plate 11 and the lifting plate 2 are respectively fixedly connected with two groups of fixed blocks 55, the fixed blocks 55 are provided with connecting grooves 56, the connecting grooves 56 are fixedly connected with positioning rods 57, and one end of the support rod 54 away from the mounting seat 53 is rotatably connected to the positioning rod 57. A plurality of groups of support rods 54 are crossly connected with a synchronous rod 58 at the cross positions. The lifting adjusting mechanism 5 further comprises a second push rod motor 511 installed on the top of the bottom plate 11, and the output end of the second push rod motor 511 is fixedly connected with a connecting block 510. The connecting block 510 is fixedly connected with a moving rod 59, the moving rod 59 penetrates through the two groups of mounting seats 53 below and the support rods 54 therein, and the support rods 54 and the moving rod 59 are rotatably connected. After the second push rod motor 511 is started, the moving rod 59 is driven to move through the connecting block 510, so that the two groups of support rods 54 arranged in parallel begin to tilt, the two groups of support rods 54 rotate around the positioning rod 57, and simultaneously drive the synchronous rod 58 to be lifted, thereby synchronously tilting the other two groups of support rods 54, supporting the lifting plate 2 and adjusting the height of the lifting plate 2. It is convenient to open the anchor rod positioning holes at the outer circle of the pillar at a low position, to lift the height of the lifting plate 2, and to open the anchor rod positioning holes again at a position higher than the outer circle of the pillar, thereby forming equidistantly distributed anchor rod positioning holes.

[0057] Finally, the battery box 6 and the control box 7 installed on the top of the bottom plate 11 are further included, the steering module 14, the power driving module 15, the magnetic grid 39, the magnetic head 310, the first push rod motor 41, the servo motor 44, the second push rod motor 511 and the battery box 6 are electrically connected with the control box 7, and the battery box 6 is used for power supply and controls each electric unit through the control box 7.

[0058] In this embodiment, first, the equipment is started through the control box 7, and the battery box 6 supplies power to each electric unit. The control box 7 sends instructions to the power driving module 15, the power driving module 15 drives the rear wheel 13 to rotate, thereby driving the mobile trolley 1 to move as a whole. At the same time, the control box 7 can adjust the steering of the front wheel 12 through the steering module 14, so that the mobile trolley 1 preliminarily approaches the pillar to be reinforced, thereby preparing for the subsequent operation around the pillar.

[0059] In the process of moving the trolley 1 close to the pillar, the distance sensing mechanism 3 on both sides of the lifting plate 2 first contacts the surface of the pillar. The roller 34 in the mounting frame 33 adheres to the surface of the pillar. Because the spring 37 is in a natural state, its elastic force pushes the first limiting rod 32 through the fixed ring 36, so that the roller 34 always closely adheres to the surface of the pillar. With the movement of the moving trolley 1, the roller 34 rolls along the surface of the pillar. If a protrusion is encountered on the surface of the pillar, the roller 34 is extruded to push the mounting frame 33 to retreat, the mounting frame 33 drives the first limiting rod 32 to retreat synchronously, and the fixed ring 36 on the first limiting rod 32 extrudes the spring 37. If a depression is encountered on the surface of the pillar, the spring 37 rebounds to push the fixed ring 36, so that the first limiting rod 32 drives the mounting frame 33 and the roller 34 to move forward, and always adhere to the depression. The end of the first limiting rod 32 away from the mounting frame 33 is fixed with the limiting plate 38, and the limiting plate 38 moves synchronously with the first limiting rod 32, and the magnetic head 310 at the bottom of the limiting plate 38 slides along the magnetic grid 39 on the mounting plate 31. The magnetic head 310 transmits displacement data to the control box 7 in real time, the control box 7 judges the concave-convex condition of the surface of the pillar according to the data, and sends instructions to the steering module 14 to adjust the turning angle of the front wheel 12, so as to ensure that the moving trolley 1 always moves stably along the outer circle of the pillar.

[0060] After the control box 7 receives the concave-convex data of the surface of the pillar transmitted by the distance sensing mechanism 3, it sends the elongation or shortening instructions to the first push rod motor 41. The output end of the first push rod motor 41 drives the connecting plate 42 to move, and the connecting plate 42 drives the motor plate 43 to move synchronously until the drill rod 45 is aligned with the preset drilling position on the surface of the pillar. The control box 7 starts the servo motor 44, and the output end of the servo motor 44 drives the drill rod 45 to rotate at high speed, at the same time, the first push rod motor 41 continuously elongates, so that the rotating drill rod 45 drills into the surface of the pillar until the drilling depth reaches half the length of the drill rod 45 itself, and the establishment of an anchor rod positioning hole is completed. The control box 7 synchronously controls the power drive module 15 to make the moving trolley 1 stop after moving a fixed distance each time, and repeats the above drilling steps to realize the equidistant distribution of anchor rod positioning holes at the same height of the pillar.

[0061] When the positioning holes at the same height of the pillar are drilled, the control box 7 sends instructions to the second push rod motor 511, the output end of the second push rod motor 511 drives the connecting block 510 to move, the moving rod 59 in the connecting block 510 moves synchronously, and the moving rod 59 pushes the two groups of supporting rods 54 below to rotate around the positioning rod 57. During the inclination of the two groups of supporting rods 54, the other two groups of supporting rods 54 are inclined synchronously through the synchronous rod 58, and the lifting plate 2 is pushed to rise along the first slide rail 22 in the fixed frame 23. When the lifting plate 2 rises to the preset height, the control box 7 controls the moving trolley 1 to move around the pillar again, and repeats the above process to complete the establishment of anchor rod positioning holes at this height. By adjusting the height of the lifting plate 2 through the lifting adjustment mechanism 5 multiple times, multiple rows of equidistantly distributed anchor rod positioning holes can be formed on the surface of the pillar to meet the reinforcement needs at different heights.

[0062] The application provides an auxiliary method for a resource recovery auxiliary device for a room-and-pillar mining process of an underground mine, comprising the following steps:

[0063] Step one, divide and set a safety isolation channel in a preset mining area, and connect existing pillars in series by using a mining pillar concrete mixing slurry to build a retaining wall for safety isolation of the mining area, and leave more than two safety channels in each mining area;

[0064] Step two, support the roof of the ore bed by using an anchor net, and the mesh of the anchor net is less than or equal to 100 mm, after the anchor net is fixed by the anchor rod, the anchor cable is reinforced, and the pulling force of the anchor cable is greater than or equal to 60 KN;

[0065] Step three, the control box 7 sends an instruction to the power driving module 15, the power driving module 15 drives the rear wheel 13 to rotate, and then drives the whole mobile trolley 1 to move, the control box 7 adjusts the steering angle of the front wheel 12 through the steering module 14, so that the mobile trolley 1 preliminarily approaches the pillar to be reinforced;

[0066] Step four, the roller 34 in the installation frame 33 is attached to the surface of the pillar, the roller 34 is always closely attached to the surface of the pillar, as the mobile trolley 1 moves, the magnetic head 310 slides along the magnetic grid 39 on the installation plate 31, the magnetic head 310 transmits displacement data to the control box 7 in real time, the control box 7 judges the concave-convex condition of the surface of the pillar according to the data, and sends an instruction to the steering module 14 to adjust the steering angle of the front wheel 12, so that the mobile trolley 1 always stably moves along the outer circle of the pillar;

[0067] Step five, after the control box 7 receives the concave-convex data of the surface of the pillar transmitted by the distance sensing mechanism 3, the control box 7 sends an instruction to the first push rod motor 41 to lengthen or shorten, and the control box 7 synchronously controls the power driving module 15, so that the mobile trolley 1 stops after moving a fixed distance each time, and the above drilling step is repeated, so that the anchor rod positioning holes at the same height of the pillar are distributed equidistantly;

[0068] Step six, when the positioning holes at the same height of the pillar are drilled, the control box 7 sends an instruction to the second push rod motor 511, the output end of the second push rod motor 511 drives the connecting block 510 to move, the lifting plate 2 is lifted to a preset height, the control box 7 controls the mobile trolley 1 to move around the pillar again, the above process is repeated, the anchor rod positioning holes at the height are drilled, and the height of the lifting plate 2 is adjusted by the lifting adjusting mechanism 5 for multiple times, so that multiple rows of equidistantly distributed anchor rod positioning holes are formed on the surface of the pillar;

[0069] Step seven, workers insert the anchor rod into the pillar according to the position of the positioning hole, use C25 concrete to reinforce or connect the small pillars planned to be small into a standard that can reach the supporting capacity, the anchor rod inserted around the small pillar is connected with the reinforced concrete, and the support force of the reinforced pillar can also be connected by using the concrete to connect the similar pillars; the concrete is poured in a layered manner from bottom to top, after the bottom layer is poured, the drilling of the next layer and the insertion of the anchor rod are performed.

[0070] Step eight, according to the reinforcement of the pillar of a number of division room, preparation of mining room in the small, too dense pillar;

[0071] Step nine, after the concrete curing standard of the reinforced pillar, the room in the too much pillar mining, mining after the corresponding pillar position of the roof support;

[0072] Step ten, lift the floor mining operation, normal from top to bottom lift floor mining operation, mining lift floor operation does not damage and reduce the size of the set reinforcement pillar;

[0073] Step eleven, regional backfill room, according to the sequence of backfill sequence, want to use the idea of fast mining fast filling backfill room, backfill height reserved 3m, after the whole panel mining is completed to implement the mortar dense filling.

[0074] The above specific embodiments are only one optional embodiment of the present application, based on the technical scheme of the present application and the related inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. Resource recovery aid for use in the longwall and pillar mining process of underground mines, characterized in that, The utility model relates to a kind of movable car for mining pillar, including: Movable car (1) moves around the pillar; Lifting plate (2) is arranged above the movable car (1), and the lifting plate (2) can move up and down; Distance sensing mechanism (3) is installed at both ends of the lifting plate (2), and the distance sensing mechanism (3) is used to monitor the change curve of the surface of the pillar; Positioning hole opening assembly (4) is arranged between the two distance sensing mechanisms (3), and the positioning hole opening assembly (4) is used to drill anchor rod positioning hole on the surface of the pillar; Lifting adjusting mechanism (5) is installed between the movable car (1) and the lifting plate (2), and the lifting adjusting mechanism (5) is used to drive the lifting plate (2) to lift and adjust the height of the distance sensing mechanism (3) and the positioning hole opening assembly (4).

2. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 1, characterised in that, The movable car (1) includes a bottom plate (11), a group of front wheels (12) and a group of rear wheels (13) are arranged below the bottom plate (11), a steering module (14) for driving the front wheels (12) to turn is installed at the bottom of the bottom plate (11), and a power driving module (15) for driving the rear wheels (13) to rotate is also installed on the bottom plate (11).

3. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 2, characterised in that, A plurality of fixed frames (23) are arranged on the outside of the lifting plate (2), the fixed frames (23) are arranged in the shape of a "H" and are fixedly connected with the bottom plate (11), two groups of first sliding rails (22) are fixedly connected on the inside of the fixed frames (23), the two groups of first sliding rails (22) are symmetrically arranged on both sides of the lifting plate (2), first sliding blocks (21) are slidably connected on the first sliding rails (22), and the first sliding blocks (21) are fixedly connected with the lifting plate (2).

4. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 3, characterised in that, The distance sensing mechanism (3) includes a mounting plate (31) fixedly connected to the top of the lifting plate (2), the mounting plate (31) is arranged in the shape of L, a plurality of first limiting rods (32) are slidably connected on the mounting plate (31), one end of the plurality of first limiting rods (32) is commonly fixedly connected with a mounting frame (33), the mounting frame (33) is arranged in the shape of a "N", a roller (34) is rotatably connected in the mounting frame (33), a fixed plate (35) is commonly slidably connected on the two groups of first limiting rods (32), the fixed plate (35) is fixedly connected with the mounting plate (31), a fixed ring (36) is fixedly sleeved on the outer ring of the first limiting rod (32), the fixed ring (36) is located on the side of the mounting plate (31) away from the mounting frame (33), a spring (37) is sleeved on the outer ring of the first limiting rod (32), the spring (37) is arranged between the fixed plate (35) and the fixed ring (36), a limiting plate (38) is commonly fixedly connected at the end of the first limiting rod (32) away from the mounting frame (33), a first limiting cylinder (311) is slidably sleeved on the outer ring of the first limiting rod (32), and the first limiting cylinder (311) is fixedly connected on the side of the mounting plate (31) close to the mounting frame (33).

5. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 4, characterised in that, A magnetic grid (39) is installed on the mounting plate (31), and a magnetic head (310) cooperating with the magnetic grid (39) is installed at the bottom of the limiting plate (38).

6. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 5, characterised in that, The positioning hole opening assembly (4) comprises a first push rod motor (41) mounted on the top of the lifting plate (2), the output end of the first push rod motor (41) is fixedly connected with a connecting plate (42), the connecting plate (42) is L-shaped, one end of the connecting plate (42) is fixedly connected with a motor plate (43), a servo motor (44) is installed on the side of the motor plate (43) close to the lifting plate (2), the output end of the servo motor (44) penetrates through the motor plate (43) and is fixedly connected with a drill rod (45), two groups of second limiting rods (46) are fixedly connected on the side of the motor plate (43) close to the lifting plate (2), the two groups of second limiting rods (46) are symmetrically arranged on the two sides of the servo motor (44), a second limiting cylinder (47) is slidably connected on the second limiting rod (46), and the second limiting cylinder (47) is fixedly connected with the lifting plate (2).

7. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 6, characterised in that, The lifting adjusting mechanism (5) comprises two groups of second sliding rails (51) fixedly connected with the bottom plate (11) and the lifting plate (2) respectively, a second sliding block (52) is slidably connected on the second sliding rail (51), two groups of second sliding blocks (52) corresponding in position are fixedly connected with mounting seats (53) respectively on the opposite sides, a supporting rod (54) is rotatably connected in the mounting seat (53), and the two groups of supporting rods (54) are cross arranged, two groups of fixed blocks (55) are fixedly connected with the bottom plate (11) and the lifting plate (2) respectively, a connecting groove (56) is formed in the fixed block (55), a positioning rod (57) is fixedly connected in the connecting groove (56), one end of the supporting rod (54) away from the mounting seat (53) is rotatably connected on the positioning rod (57), and a plurality of groups of the supporting rods (54) are rotatably connected with a synchronous rod (58) at the cross positions.

8. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 7, characterised in that, The lifting adjusting mechanism (5) further comprises a second push rod motor (511) mounted on the top of the bottom plate (11), the output end of the second push rod motor (511) is fixedly connected with a connecting block (510), a moving rod (59) is fixedly connected in the connecting block (510), the moving rod (59) penetrates through the two groups of mounting seats (53) below and the supporting rods (54) therein, and the supporting rod (54) is rotatably connected with the moving rod (59).

9. A resource recovery aid for use in a longwall mining process of an underground mine as claimed in claim 8, characterised in that, It also comprises a battery box (6) and a control box (7) mounted on the top of the bottom plate (11), the steering module (14), the power driving module (15), the magnetic grid (39), the magnetic head (310), the first push rod motor (41), the servo motor (44), the second push rod motor (511) and (6) are all electrically connected with the control box (7).

10. An auxiliary method for a resource recovery auxiliary device for a room-and-pillar mining process of an underground mine according to any one of claims 1 - 9, characterized in that, The method comprises the following steps: Step one, divide and set the safety isolation channel of the preset mining area, use the concrete mixed slurry to build the retaining wall of the safety isolation pillar in the mining area, and connect the existing pillars, and set more than two safety channels in each mining area; Step two, anchor the roof of the mining layer with the anchor net, and the mesh of the anchor net is less than or equal to 100mm, after the anchor net is fixed by the anchor rod, the anchor cable is reinforced, and the tension of the anchor cable is greater than or equal to 60KN; Step three, the control box (7) sends instructions to the power drive module (15), the power drive module (15) drives the rear wheel (13) to rotate, and then drives the mobile trolley (1) to move as a whole, the control box (7) adjusts the steering of the front wheel (12) through the steering module (14), so that the mobile trolley (1) preliminarily approaches the to-be-reinforced pillar; Step four, the roller (34) in the installation frame (33) is attached to the surface of the pillar, the roller (34) is always closely attached to the surface of the pillar, as the mobile trolley (1) moves, the magnetic head (310) slides along the magnetic grid (39) on the installation plate (31), the magnetic head (310) transmits displacement data to the control box (7) in real time, the control box (7) judges the concave-convex condition of the pillar surface according to the data, and sends instructions to the steering module (14) to adjust the steering angle of the front wheel (12), so that the mobile trolley (1) always moves stably along the outer circle of the pillar; Step five, after the control box (7) receives the concave-convex data of the pillar surface transmitted by the distance sensing mechanism (3), it sends the elongation or shortening instructions to the first push rod motor (41), and the control box (7) synchronously controls the power drive module (15), so that the mobile trolley (1) stops after moving a fixed distance each time, and the above drilling steps are repeated to realize the equidistant distribution of the anchor rod positioning holes at the same height of the pillar; Step six, when the positioning holes at the same height of the pillar are drilled, the control box (7) sends instructions to the second push rod motor (511), the output end of the second push rod motor (511) drives the connecting block (510) to move, and after the lifting plate (2) is lifted to the preset height, the control box (7) controls the mobile trolley (1) to move around the pillar again, and the above process is repeated to complete the opening of the anchor rod positioning holes at this height, and the height of the lifting plate (2) is adjusted by the lifting adjustment mechanism (5) multiple times to form multiple rows of equidistantly distributed anchor rod positioning holes on the surface of the pillar; Step seven, workers insert anchor rods into the pillar according to the position of the positioning hole, use C25 concrete to reinforce or connect the planned small pillars into a standard that can reach the supporting capacity, the anchor rods inserted around the small pillars are connected with the reinforced concrete, and the support force of the pillars can also be connected and reinforced by concrete, and the concrete is poured in layers from bottom to top, and after pouring the bottom layer, the drilling and opening of the next layer and the insertion of the anchor rod are performed; Step eight, according to the first number of the reinforced pillars, the mine house is divided, and the over-small and over-dense pillars in the mine house are prepared for recovery; Step nine, after the concrete of the reinforced pillars is cured to the standard, the excessive pillars in the mine house are recovered, and the roof at the corresponding position of the pillars is supported after the recovery; Step ten, lifting bottom recovery operation, normal lifting bottom recovery operation from top to bottom, the lifting bottom recovery operation does not damage and reduce the size of the set reinforced pillars; Step eleven, regional backfilling of the mine house, according to the recovery sequence, the backfilling sequence is formulated, the mine house is backfilled with the idea of fast mining and fast filling, the backfilling height is reserved by 3m, and after the whole panel is recovered, the sand mortar dense filling is implemented.

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